The issue seems to lie in the Jellybean browser not correctly communicating with the PHP code. A way to workaround this problem is to simply remove the condition surrounding the get_header() and get_footer() function.
Files to modify:
themes/default/page.php, themes/default/index.php and themes/default/single.php
Header fix (Line 1):
<?php global $is_ajax; $is_ajax = isset($_SERVER['HTTP_X_REQUESTED_WITH']); get_header(); ?>
Footer fix (Last line):
<?php global $is_ajax; get_footer(); ?>